John stoker



claimt sans,

@JOHN sronnn, or rnnKsKI'LL, New -YoRK.

Letters Patent No. 104,059, dated June 21, 1870; catala-tell June 9,1870.

l STOP MOTION FOR STEAM-ENGINES.

` The Schedule referred to in these Letters Patent and making part ofthe same.

To all whom it may concern: l

Be it known that I, J cnn Sronnn., of` Peekskill, in the county of.Westchesten State of New York, have invented a new and usefulImprovement in Stop Motion for Steam-Engine; and I do hereby declare thefollowing to be a full, clear, and,exact description thereof', whichwill enable those skilled in the art to :make and use the same,reference being had ,to the accompanying drawing forming part o'f this'specificais a transverse vertical section of the blowing-engines, butit is also applicable to steam-en! gines of any otherdescription; and

It consists in the arrangement of a spring piston exposed to thepressure of the blast in the blast-pipe,- and serving as alstop'for thedamper or valve in said.

4blast-pipe in such a manner that, when fromv some cause the pressureofthe blast-pipe is suddenly decreased, the stop of the valve isautomatically withdrawn and the valve is closed, thereby maintainingsufficient pressure in the blast-pipe'and blowingLcylinder to preventthe piston or plunger, working in said cylinder, from smashing againstthey cylinderheads.

The invention consists, further, in connecting the spring piston, whichis exposed to the pressure of the blast in the blast-pipe, orto thepressure of a duid in a pipe applied jto the engine for this particularpurp'ose, by suitable levers, with the throttle-valve in the`steam-supply pipe in such a manner that, whenever the pressure in theblast-pipe, or its equivalent, decreases below a certain limit, the`supply of steam to the steam-piston .is cut oli, andthe engine isprevented from racing.

llhe letter A designates the blast-pipe of a direct actingblowing-engine, and in this'blast-pipe is a valve, B, which4 is mounted.on a pin, a, that has its bearings in the sides of the blast-pipe. l

On one end of this pin, outside the pipe, is secured a segmental lever,-C, which is loaded with a weight c, so that said lever, when allowed tofollow the ac tion .of its inherent gravity, will close the valve( Tothe side of the blast-pipe A is secured a cylinder,

D, which communicates, by a pipe, 11,' with the blast pipe, and which isfitted with4 a piston, E, secured to l a'rod, e.

This piston is exposed to the action of a spring, f, which has atendency to pull the same down, and the piston-rod e projects above vtheupper cylinder-head,

and carries a cross-h cad, g, which forms thebearings for twoguide-rollers h, and for a friction-roller, (i.

The guide-rollers it are grooved, and bear against rods j, which risefrom the cylinder-head.

When the engine is started, the valve B is thrown open to the positionindicated in dotted lines in the drawing, and the pressure of the air inthe blast-pipe, acting on the piston E, forces the same up against theaction of itsspring, so that the friction-roller t' forms a stop for thevalvelever C, and prevents the same from closing the valve.

In this position, the weight or pressure of the valvelever@ against theroller i is sustained by the guiderollers h bearing against the rods j,and thereby the piston-rod e is prcventedfrom b eing crowded out in a4lateral direction, and the piston E :noves up and down without binding.

The tension of the spring f is so adjusted that it will be overcome bythe ordinary pressure of l theblast against the piston E, but if, fromsome cause, the pressure ofthe blast in the blast-pipe is decreasedbelow a certain point, the spring f draws the piston E down, and thelever G,`being relieved from the stop roller i, drops down and closesthe valve. e

By thus closing the valve, the resistance of the air against th-e pistonof the blowing cylinder' will be kept up, and said-piston is preventedfrom smashing against the heads of its cylinder,

The piston of the regulating cylinder D is also connected to thethrottle-valve Fin the pipe G, which conducts steam to thesteam-cylinder of the blowingengine. This connection is effected by anelbow-lever, It 7, one arm, 7s, of which connects with the cross-head onthe piston-rod e, while its other arm, l, carries two,

studs on a, as shown in iig. 1 of the drawing.

If the piston E is down, the stud a bears againstthe bottom edge of alatch, o, which is connected toV the stem of the throttle-valve F, butas soon as the piston E rises, the -stud 'a descends and allows thenotch p of the latch o to catch over the stud m, and the throttle-valveis opened,

If the pressure in the blast-pipe A is decreased below the desiredlimit, so that the piston E is drawn down by the action of its spring f,the stud n throws the latch out of gear with the-stud m, and a lever, H,

loaded with a weight, I, and connected to the stem of' thethrottle-valve,closes said throttle-valve, and steam is cut oil' fromthe steam-cylinder of the blowing-enoine.

c By this arrangement, the engine is prevented from racing, if thepressure of the air in theblast-pipe de creases below a certain limit,and accidents or injury to the engine are prevented.

It is obvious that a pipe containing fluid under pressure, and servingthe same purpose as the blast- 2. The regulating spring pistou E, incombination pipe A, may be applied in place of said blast-pipe, in. withthe pipe A and throttle-,valve F, in the steamcombination with theabove-described mechanism for pipe G ot' a steam-engine, substantiallyas set forth.

closing the tl1r0ttle-valve of a steam-engine automa- This specificationsigned by me this 24th day of ticaliy. August, 1869.

What I claim as new, ann nesire to secure by Letn JOHN STORER.

ters Patent, is-

l. The regulating spring piston E, in combination vfitnessesw with theblast-pipe A and its valve B, substantially as W. HAUFF, shown anddescribed. E. F. KASTENHUBER.

